Maestro - The Sustainer [schematic]
- analogguru
- Old Solderhand
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Up for sale on evilbay:
https://cgi.ebay.com/vintage-MAESTRO-TH ... 240%3A1318
Looks like EH-made..... somebody has more infos or even guts ?
analogguru
https://cgi.ebay.com/vintage-MAESTRO-TH ... 240%3A1318
Looks like EH-made..... somebody has more infos or even guts ?
analogguru
There´s a sucker born every minute - and too many of them end up in the bootweak pedal biz.
- DiscoFreq
- Resistor Ronker
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I asked to bid, but I received the sellers reply too late to use the Buy It Now button...
I hope he removes the restrictions because I tried to bid (it was ok for him) but I couldn't...
I hope he removes the restrictions because I tried to bid (it was ok for him) but I couldn't...
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- modman
- a d m i n
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Still nothing on this one?
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- Greenmachine
- Cap Cooler
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That board is swimming in goop.
"[Y]ou want sketchy, dude? I breadboard on a door." -- RnFR, 2011
"This amp is freakin loud, like crazy, I'm going to kill pets loud." -- mich, 2011
"This amp is freakin loud, like crazy, I'm going to kill pets loud." -- mich, 2011
- theehman
- Diode Debunker
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In the process of de-gooping one of these today. So, far I can see the bottom of the PCB and it has (2) transistors and (2) 14-pin ICs.
Ron Neely II
Electro-Harmonix info: http://electroharmonix.vintageusaguitars.com
Home of RonSound effects: http://www.ronsound.com
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Electro-Harmonix info: http://electroharmonix.vintageusaguitars.com
Home of RonSound effects: http://www.ronsound.com
fx schematics and repairs
- toneman
- Resistor Ronker
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EHman,
did you get any numbers off the transistors or the ic's yet??
an earlier post of the layout shows 4 transistors(?)
the power connections to the IC's look strange (4139?)
there's another one on ebay now--
https://www.ebay.com/itm/360599747082?s ... 1423.l2649
there's this version of the box and a "big muff" box style, without the slide switch.
which version are you de-gooping?
afn
T
did you get any numbers off the transistors or the ic's yet??
an earlier post of the layout shows 4 transistors(?)
the power connections to the IC's look strange (4139?)
there's another one on ebay now--
https://www.ebay.com/itm/360599747082?s ... 1423.l2649
there's this version of the box and a "big muff" box style, without the slide switch.
which version are you de-gooping?
afn
T
Tone-to-the-Bone
- theehman
- Diode Debunker
Information
That's the one I'm degooping.
toneman wrote:EHman,
there's another one on ebay now--
https://www.ebay.com/itm/360599747082?s ... 1423.l2649
there's this version of the box and a "big muff" box style, without the slide switch.
which version are you de-gooping?
afn
T
Ron Neely II
Electro-Harmonix info: http://electroharmonix.vintageusaguitars.com
Home of RonSound effects: http://www.ronsound.com
fx schematics and repairs
Electro-Harmonix info: http://electroharmonix.vintageusaguitars.com
Home of RonSound effects: http://www.ronsound.com
fx schematics and repairs
- theehman
- Diode Debunker
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Not much more to go. The ICs are Fairchild U6A7757393. Couldn't find any info on the interwebs on those. The transistors are 2N5133 and 2N3565.
Ron Neely II
Electro-Harmonix info: http://electroharmonix.vintageusaguitars.com
Home of RonSound effects: http://www.ronsound.com
fx schematics and repairs
Electro-Harmonix info: http://electroharmonix.vintageusaguitars.com
Home of RonSound effects: http://www.ronsound.com
fx schematics and repairs
- Dirk_Hendrik
- Old Solderhand
Information
and these are opamps. Dil-"how much"? After which my first impression would be a (LM)393. Tracing the circuit while attempting to draw in a basic opamp stage would verify wether the assumed pinout would lead to a circuit that makes sense.
- theehman
- Diode Debunker
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Sounds reasonable. They're 14 pin DIL.Dirk_Hendrik wrote:and these are opamps. Dil-"how much"? After which my first impression would be a (LM)393. Tracing the circuit while attempting to draw in a basic opamp stage would verify wether the assumed pinout would lead to a circuit that makes sense.
Ron Neely II
Electro-Harmonix info: http://electroharmonix.vintageusaguitars.com
Home of RonSound effects: http://www.ronsound.com
fx schematics and repairs
Electro-Harmonix info: http://electroharmonix.vintageusaguitars.com
Home of RonSound effects: http://www.ronsound.com
fx schematics and repairs
- grizzlytone
- Breadboard Brother
This was my attempt at making sense of the PCB layout presented here: viewtopic.php?f=16&t=3552&hilit=maestro+sustainer.
Without having actually seen the component side I guessed on the use of FET's. This is the SS-3 version though -is this the version you're working on Ron?
So. For what it's worth...
Without having actually seen the component side I guessed on the use of FET's. This is the SS-3 version though -is this the version you're working on Ron?
So. For what it's worth...
- Attachments
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- Maestro SS-3 Sustainer schematic -small and lo-res.bmp (492.05 KiB) Viewed 3189 times
- analogguru
- Old Solderhand
Information
Hows about some pictures ?theehman wrote:Not much more to go. The ICs are Fairchild U6A7757393. Couldn't find any info on the interwebs on those. The transistors are 2N5133 and 2N3565.
analogguru
There´s a sucker born every minute - and too many of them end up in the bootweak pedal biz.
- theehman
- Diode Debunker
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Have to borrow a camera. Mine's lost somewhere.analogguru wrote:Hows about some pictures ?theehman wrote:Not much more to go. The ICs are Fairchild U6A7757393. Couldn't find any info on the interwebs on those. The transistors are 2N5133 and 2N3565.
analogguru
grizzlytone: This must be an SS-1. There's only the 2 transistors and no FETs.
Ron Neely II
Electro-Harmonix info: http://electroharmonix.vintageusaguitars.com
Home of RonSound effects: http://www.ronsound.com
fx schematics and repairs
Electro-Harmonix info: http://electroharmonix.vintageusaguitars.com
Home of RonSound effects: http://www.ronsound.com
fx schematics and repairs
- toneman
- Resistor Ronker
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- Posts: 343
- Joined: 17 Jul 2007, 13:05
- my favorite amplifier: anything that works
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The LM393 is a comparator and usually comes in an 8pin DIP package.
maybe the U6A7757393 is some sore of "house brand"??
hard to draw a schematic when one doesn't know what the opamp package is
maybe the U6A7757393 is some sore of "house brand"??
hard to draw a schematic when one doesn't know what the opamp package is
Tone-to-the-Bone
- toneman
- Resistor Ronker
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- Posts: 343
- Joined: 17 Jul 2007, 13:05
- my favorite amplifier: anything that works
- Completed builds: meatolation, wobolation, ringolation clones, PAiA synths/modulars, dipthonizer clone, MOTM modules, pedal mods and repairs
- Location: sacatomatoes, Kali4neeaa
- Has thanked: 183 times
- Been thanked: 45 times
grizzly,
that blob that Ron has looks like only 1 9V connector
He also said it was in the same box as the ebay unit.
T
that blob that Ron has looks like only 1 9V connector
He also said it was in the same box as the ebay unit.
T
Tone-to-the-Bone
- theehman
- Diode Debunker
Information
I didn't get the box with the block so I may be wrong on that.toneman wrote:grizzly,
that blob that Ron has looks like only 1 9V connector
He also said it was in the same box as the ebay unit.
T
Ron Neely II
Electro-Harmonix info: http://electroharmonix.vintageusaguitars.com
Home of RonSound effects: http://www.ronsound.com
fx schematics and repairs
Electro-Harmonix info: http://electroharmonix.vintageusaguitars.com
Home of RonSound effects: http://www.ronsound.com
fx schematics and repairs
- grizzlytone
- Breadboard Brother
I haven't seen the blob in question. From the pictures that I've seen all three versions used two 9V batteries but it is possible that some of the SS-1's presented on eBay has been upgraded or modified I guess (SS-1 cover and SS-2 innards?). Here's pics of the three versions, notice same version blob in SS-1 and SS-2:theehman wrote:I didn't get the box with the block so I may be wrong on that.toneman wrote:grizzly,
that blob that Ron has looks like only 1 9V connector
He also said it was in the same box as the ebay unit.
T
SS-1: SS-2: SS-3:
Have you guys seen this?
Obviously AnalogGuru has since it's hosted on his site, but I wanted to post it here in case it helps the conversation.
Obviously AnalogGuru has since it's hosted on his site, but I wanted to post it here in case it helps the conversation.
Sorry, forgot to add, that's the SS-3 according to the ILoveFuzz forum folks.
- grizzlytone
- Breadboard Brother
Yep. That's the one PCB layout I was refering to in my post with the guesswork schematic. Thanks for the clarification.Effectsiation wrote:Have you guys seen this?
[ Image ]
Obviously AnalogGuru has since it's hosted on his site, but I wanted to post it here in case it helps the conversation.